Audiologic evaluations consist of a series of tests used to determine whether a hearing loss exists and, if so, measure its type, degree and configuration. Dr. Christen will assess the results of each individual test in order to develop a treatment plan geared toward your unique hearing loss.
Who Should Be Give an Audiologic Evaluation?
A hearing evaluation can benefit patients of all ages, even those who do not exhibit signs of hearing loss.
Hearing loss is a progressive condition that often develops slowly. Many people are not aware of a change in their hearing because they gradually adapt to the subtle changes in their hearing ability over time. Studies indicate that it takes seven years, on average, for a hearing impaired individual to seek treatment.
An audiologic evaluation should be the first course of action for anybody who even suspects a hearing loss. The sooner a diagnosis of hearing loss is made, the more successful treatment will be. Early detection means more options for the patient.
Many physicians urge making audiologic evaluations a routine part of your overall health care, much like regular vision exams and dental checkups. They are quick, painless and provide immediate results.
What Does Diagnostic Testing Entail?
A comprehensive audiologic evaluation consists of a series of individual diagnostic tests that measure different aspects of your hearing. You may be given any or all of the following tests:
Pure Tone Testing
Pure tone testing (also known as pure tone audiometry) uses air conduction to measure the softest volume you can hear at each pitch. Wearing headphones, you will be asked to identify a series of tones by raising a hand, pressing a button, or responding verbally.
The results are charted on an audiogram, a graph that shows the type, degree and configuration of your hearing loss by comparing pitch (frequency) with loudness (intensity). The pattern recorded will help your audiologist determine your hearing threshold(s).
Bone Conduction Testing
Bone conduction testing is another type of pure-tone test that measures the inner ear’s response to sound. If there is damage or a blockage in the outer or middle ear, bone conduction audiometry testing may be used.
Instead of sending the tones through the ear, this type of testing is able to bypass the outer and middle ear and send the tone directly to the inner ear. A small device is placed behind the ear which sends out a vibration that passes through the skull bone to reach the inner ear.
Bone conduction testing is often used in place of air conduction testing when an obstruction in the outer or middle ears is present.
Speech (or word recognition) testing is used to measure your speech reception threshold (SRT), or the faintest speech you can hear and repeat back consistently. This is compared with your pure-tone test results to confirm the diagnosis. In addition, your ability to separate speech from background noise will be recorded.
Speech testing may be administered in either a quiet or noisy environment; results are recorded on the audiogram for easy visual reference.
Tympanometry is a test of the middle ear used to detect fluid, eardrum perforations and tumors. It measures movement of the eardrum in response to air pressure; the results are recorded on a chart called a tympanogram.
Acoustic Reflex Testing
The acoustic reflex test measures involuntary muscle contractions of the middle ear, and is used to determine the location of your hearing problem (the ossicles, cochlea, auditory nerve, etc.) as well as the type of hearing loss.
Call Hearing Advancement Center at (425) 485-8430 for more information or to schedule an appointment.